PTR Lookup

Reverse DNS for an IP address

Find the hostname associated with an IP using PTR records.

Type an IP address to check PTR records.

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What is reverse DNS?

Reverse DNS resolves an IP address back to a hostname using PTR records.

PTR records are often required for email servers and security checks.

If no PTR exists, the IP may not have a reverse mapping configured by the owner.

Check forward DNS for the hostname you find.

See other record types once you have a domain.

Many mail servers check PTR records to reduce spam and verify sender legitimacy.

PTR records are managed by the IP address owner, typically the ISP or hosting provider.

Yes, but it should align with forward DNS for best reputation and deliverability.